Post by Paul D<snip>
Post by Paul DBill, just curious - have you managed to motorise your dish
successfully, and if so how does it work with the SL65?
[..]
Post by Paul DThanks Bill. Pity the HH90 didn't cut the mustard. It will be
interesting to know how the motorisation goes when you finally
get a decent motor installed.
OK... this is a belated bit of catchup for any who are
still interested... (References to earlier articles
should be above, somewhere)...
Maplin's - bless their little cotton socks - came up
with the goods and refunded the non-working Stab motor.
This I replaced immediately with the other motor held
in stock by Maplin ..the Metronic Horizon to Horizon
motor, ref: 450907. (Although listed by Maplin as
suitable for dishes up to 1000mm - one metre - it's box
clearly states that it can be used for dishes of 1.2m
..so I guess an 82/85cm dish is well within capacity)...
In the event the whole - using the discrete USALS menu
that comes installed in the SL65's firmware - was a bit
of a non-event.. :)) Believe me, the setup could have
been installed in around 30 minutes or less, from start
to finish - and after a few weeks, is presently operating
very correctly..
..from the far easterly NSS 703 at 57E, (NKTV - the just
started and first-time Nepalese TV?? ...and in English,
no less!), to the number of East Russian quality channels
as found on Express AM22's 53E), to the far Atlantic
position of Cuba TV's - (and Ecuador's(?) Channel 5),
beamcast from PAS 9 at 58W...
This is about as Horizon to Horizon as it can get with a
smaller 82cm dish! Oh yes ..and not to forget all the
satellites littering the heavens between 57E and 58W... :))
..but ..to the nitty gritty - and starting at the start.
Writing this will take longer than the 'real-life'
installation actually took!
1. Read Bill Wright's excellent article warning
about aerial (take that as including dish)
installation horrors! Taking note of same.... ;))
Using a south facing wall - and having previously marked
out true south - using the shadow of the midday (12h00 GMT)
sun marked permanently on the path below. (Note, the
direction of true south will change slightly depending on
where you are located ..and it's /not/ the same as magnetic
south - although very near to it)...
2. ...mount installed and checked that it was
indeed a /very/ accurate perpendicular ..that
is, absoutely vertical to the ground in all
'directions'.
Although not needed, plenty of backing washers
were to hand to ensure that the backing plate
allowed the mounting pole to be adjusted to the
absolute perpendicular.
In the event, total time taken was no more than
a few minutes - albeit interspersed with tea!
This 'absolutely perpendicular' position was checked, re-
checked and then, when ready, checked yet again. I don't
think one can underestimate the importance of these two
basic operations. Everything else flows from this....
Without the perpendicularity of the mount, or that the
whole is aligned to /true south/ ..the motor and it's
attached dish cannot track the Clarke belt with all those
luvverly geo-stationary satellites accurately.
3. Metronic motor was then checked that it was indeed
at it's factory-set position of 0.00degrees. (It
was - but if not, this could be reset simply, on the
ground by connecting to and powering up from the
receiver, prior to mounting).
4. The motor was then bolted to it's backing mount,
ensuring that the Metronic very well written but
rather useless 'elevation' DiSEQc 1.2's settings
were ignored in favour of Stab's USALS 'Latitude'
setting not mentioned in the Metronic manual.
Difficult? ..not in the least! Metronic has kindly
marked latitude settings clearly on the other side
of it's 450907/8 sturdy metal backing plate.. :))
Oh yes ..acquired the precise latitude, (to the required
0.1 degree of the installation position), from www.multimap.com
5. The dish and motor were then bolted and aligned to
each other, so that the whole unit, (dish, mount and
motor), could be perfectly aligned to true south and
the highest part of the equatorial Clarke Belt 'arc'...
6. Shinning up the ladder, (or rather friend and retired
one time TV Engineer used to this, sort of!) ..the
motor and dish were then mounted on the perpendicular
'pole' and temporarily secured to the true south
position at 180.00degrees (..or in inaccurate Euro-
parlance, 0.00deg South)!
5. Leads from the LNB and the SL65 Receiver were then
connected ..resulting in one lead being remade as
the simple 3.99gbp satellite locator suggested a
slight fault in an 'F' plug lead ..obvious as the
thing started bleating plaintively!
6. The SL65's USALS installation menu was entered and
the installation's latitude, longitude was entered
for the Hotbird group at 13E ..(in this case and not
having the desirable Thor 1,2/ Intel 10-20's central
position at the highest 1W position pre-stored).
The auto-tune menu was then entered so that the rotor
arm with attached dish could be moved to it's new
position at 13E.
NB: It is vital that the rotor arm is moved to the
position of the (to be acquired) satellite nearest to
true south first, /before/ any 'tweaking', so that the
relative positions of all the satellites remains fixed
in relation to true south ..and not to a spurious setting...
7. Said friend then gently ..and slowly(!) ..tweaked
the dish slightly to and fro laterally and with a
minute adjustment to the marked elevation of 22.5deg
(it's an early LiDL 10degree offset dish), until the
strongest signal was being received, whistling through
the locator.
The whole unit was then tightened on it's nuts ..and
no, it didn't complain.
Now came the hardest and most complex bit of all - and
upon which the rest of the installation stands ..or falls!
Coffee was made ..and the TV watched, with admiration, as
many, varied, stored SL65 channels were in turn flicked through.. :))
..and that, folks, was basically 'it'!
Very quick followups was a check that Thor 1,2/Intel 10-20's
position at 1W was indeed being picked up satisfactorily ..a
pointer perhaps for Comag/LiDL's note that this satellite
position could be factory stored for a new User using the
USALS menus - if indeed this hasn't already been noted...
..oh and a check that the farthest reaches East and West do
in fact pick up as intended.. Turksat at 90pc 'strength' with
a 72pc 'quality' - and up to 95pc with 100pc 'quality' on the
'Dogan' transponder to the expected 95pc strength and 100pc
quality of the French channels of France 1,2,3,4 and 5 at
Atlantic Bird 3's position at 5W!
..and thus it has remained, despite some severe rainfalls, a
few very strong winds and some icicles... and the attentiion of
a very determined spider!
As it's all USALS, then positions that might be stored in the
motor are unused ..with USALS the first installation of latitude
and longitude entered into just one satellite position then stores
this position for reference in all (yet to be entered) satellite
positions - whether using auto or manually tuning...
It just takes time to go to each new satellite, grab what's
available, look with amazement at the size of some of the
things on offer ..and delete many thousands of the same ..to
end up with some entirely watchable channels.
One point ..when storing new channels, I've found it useful
to number each satellite from whatever in the East to whatever
you might be able to get in the West. This allows one to 'sort'
the channels by 'satellite' ..and is /very/ helpful in avoiding
the dish flailing from one horizon to the other and back again
when flicking through channels. If you don't know what I mean,
you soon will... ;))
Incidentally, with LiDL's accurate 82cm dish, (non-rusting
after three years off weather-worn prior installation), there
is a quite a noticeable difference between the almost identical
positioning of Eurobird 1 at 28.5E and Astra 2D at 28.2E..!
These positions are often thought of as being the same.. but
in fact the channels downlinked from one position may not
necessarily be repeated in the other ..even if the two are
less than a nominal 0.3degree twitch away from each other...
By the bye.. all positions are being relayed through a very
successful LiDL 3.99gbp 0.6 LNB, with very acceptable digital
piccies in brilliant colour etc etc. The sensitivity of
Comag/LiDL's SL65 may yet become legendary!
Cost of motor.. 59.95gbp, inc vat. Cost of box, 39.95gbp inc
vat in June 2005, (it's the fully spec'd one). Cost of dish
..um, it came with an initial analogue kit c. 2002 at 39.00gbp
..but would now be 14.99gbp as a LiDL separate, including all
'F' plugs, 20 metres of quality cabling, digital satellite
locator with earpiece etc etc etc...
..in all, around a digital installation total of 100.00gbp
(115.00gbp with added dish), spread over three years...
I'm well pleased :))
..but do wonder at all the complex DiSEqC 1.00/1.2 setups,
calculations, elevations, declinations and vast amounts of
diagrams et al, when most if not all modern receivers now
have the free, freely available and so easy USALS (Universal
Satellite Automatic Locating Setup) on board, whereby the
software does it all for the User ..just like magic...
Hope all this helps any who might be interested.. :))
..and posting separately, as requested a short while ago, to
alt.sat.euro etc...
Bill ZFC (or Bill (Adopt) as per siggy somewhere)...
e&oe... ;))
Accs: Sir William Wright, Aerial Installer and sometime author
for "What Satellite and Fidgital TV", for demonstrating how an
'F' plug should be wired up and protected ..and how /not/ to
install a dish on the end of a flexible pole attached to a north
facing wall!
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